Porous Ti-6Al-4V Alloy Prepared by a Press-and-Sinter Process

Abstract:

This paper reports the synthesis of porous titanium with a nominal composition of Ti-6 wt%Al-4wt%V through a press-and-sinter process. Blended elemental (BE) mixtures of Ti and master alloy Al-40V powders were uniaxially pressed and sintered in vacuum. Porosity of the sintered samples was determined in the range of 23vol. % to 37vol. % by the Archimedes method. Tensile strengths were found to range from 73 to 147MPa and Young’s moduli of the sintered samples varied from 3.4GPa to 13GPa. Both tensile strength and elastic modulus decreased with increasing porosity. Electrochemical assessment of the sintered porous samples showed deteriorated corrosion resistance, as compared to 95% dense Ti-6Al-4V prepared by sintering pre-alloyed powder. The challenge of using blended elemental powder sintering to fabricate porous Ti-6Al-4V alloys is discussed.

• Periodical: Key Engineering Materials (Volume 520)
• Pages: 76-81
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.520.76
• Online since: August 2012
• Authors: Hai Lian Bi, Chang Zhou Yu, Peng Cao, Yue Hui He
• Keywords: Mechanical Property, Porous Alloy, Powder Sintering, Ti6Al4V

References

[1] M.J. Donachie, Titanium: A Technical Guide, 2nd ed., ASM International, Materials Park, OH, (2000).

[2] N. Poondla, T.S. Srivatsan, A. Patnaik and M. Petraroli, A study of the microstructure and hardness of two titanium alloys: Commercially pure and Ti–6Al–4V, J. Alloys Compd., 486 (2009) 162-167.

DOI: 10.1016/j.jallcom.2009.06.172

[3] M. Qian, Cold compaction and sintering of Titanium and its alloys for near-net-shape or preform fabrication, Int. J. Powder Metall., 46 (2010) 29-44.

[4] S.J. Simske, R.A.A., T.A. Bateman, Porous Materials for Bone Engineering. Mater. Sci. Forum, 250 (1997) 151-182.

DOI: 10.4028/www.scientific.net/msf.250.151

[5] G. Ryan, A. Pandit and D. P. Apatsidis, Fabrication methods of porous metals for use in orthopaedic applications, Biomater., 27(2006) 2651-2670.

DOI: 10.1016/j.biomaterials.2005.12.002

[6] C. Leyens, M. Peters, Titanium and Titanium Alloys: Fundamentals and Applications, Wiley-VCH, Chichester, (2003).

[7] G. B. Saupe, Y. Zhao, J. Bang, N. R. Yesu, G. A. Carballo, R. Ordonez and T. Bubphamala, Evaluation of a new porous titanium-niobium mixed oxide for photocatalytic water decontamination, Microchem. J., 81(2005) 156-162.

DOI: 10.1016/j.microc.2005.01.002

[8] J. Banhart, Manufacture, characterisation and application of cellular metals and metal foams, Prog. Mater Sci., 46(2001) 559-632.

DOI: 10.1016/s0079-6425(00)00002-5

[9] Rak, Z.S. and J. Walter, Porous titanium foil by tape casting technique, J. Mater. Process. Technol., 175(2006) 358-363.

DOI: 10.1016/j.jmatprotec.2005.04.066

[10] K. Alvarez, S. -K. Hyun, H. Tsuchiya, S. Fujimoto and H. Nakajima, Corrosion behaviour of Lotus-type porous high nitrogen nickel-free stainless steels, Corros. Sci., 50(2008) 183-193.

DOI: 10.1016/j.corsci.2007.06.004

[11] H. Kim, Y. Han and J. Park, Evaluation of permeable pore sizes of macroporous materials using a modified gas permeation method, Mater. Charact., 60(2009) 14-20.

DOI: 10.1016/j.matchar.2008.05.002

[12] P. Shen, M. Song, Y. He, H. Gao, J. Zou, N. Xu, B. Huang and C. Liu, Synthesis and characterization of porous Fe–25 wt. % Al alloy with controllable pore structure, Powder Metall. Met. Ceram., 49(2010) 183-192.

DOI: 10.1007/s11106-010-9220-x

[13] R. Solmaz, A. Döner, İ. Şahin, A. O. Yüce, G. Kardaş, B. Yazıcı and M. Erbil, The stability of NiCoZn electrocatalyst for hydrogen evolution activity in alkaline solution during long-term electrolysis, Int. J. Hydrogen Energy, 34(2009) 7910-7918.

DOI: 10.1016/j.ijhydene.2009.07.086

[14] Y.F. Yang, S.D. Luo, G.B. Schaffer, M. Qian, Sintering of Ti-10V-2Fe-3Al and mechanical properties, Materials Science and Engineering A, 528 (2011) 6719-6726.

DOI: 10.1016/j.msea.2011.05.041